DR-242 … DR-247 are in. The spec now says so rather than reading as a proposal
for work that already exists.
One deviation is recorded rather than quietly absorbed: DR-246 called for the
engines to own seek strategy outright, and they cannot — re-negotiating a
stream needs the repository, which sits above them. The engine declares the
ability and the caller acts on it. `determine_video_seek_strategy` therefore
survives, correctly typed over a declared capability instead of over a guess,
because the defect was its input rather than its existence.
dtourolle
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